Friction-gearing.



PATENTED AUG. 13, 1907.

R. & J. GAWRON. FRICTION GEARING.

APPLICATION FILED MAY 9.1906.

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TH: NQRRIS PETERS CD4, WASHINGTON, D. C.

No. 863,376. PATENTED AUG. 13, 1907. R. & J. GAWRON.

FRICTION GEARING.

APPLICATION FILED MAY 8, 1906.

3 SHEETS-SHEET 2.

THE NORRIS PETERS co. wlsumcrou, n. c,

PATENTED AUG. 13, 1907.

R. &.J. GAWRON. FRICTION GEARING.

APPLICATION FILED MAY e. 1906.

3 SHEETSSHEET 3.

fiadaz Qawz07a t) flag/rora THE :aRms PETERS C0,. WA smrvcrau, a c.

UNITED STATES PATENT OFFICE.

RUDOLF GAWRON, OF GREIFSWALD, AND JOSEF GAWRON, OF SOHONEBERG, NEARBERLIN, GERMANY.

Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed May 8,1906. Serial No. 315,813.

To all whom it may concern:

Be it known that we, RUnoLF GAWRON and Josnr GiiwnoN, engineers,subjects of the King of Prussia, residing in Germany, the first named ofourselves at 5 Greifswald, the second named at Schoneberg, near Berlin,Germany, have invented new and useful Improvements in Friction-GearingEspecially for Motor Cars, of which the following is a specification.

The invention relates to friction gearing, and has l for its object theprovision of a friction gearing appropriate especially for motor carswith a friction wheel which is movable between two rotatable elements,such as a conical disk and roller and is formed as a. circumferentialfriction wheel or a double conical friction wheel.

. The invention consists essentially in forming the conical disk as ahollow cone. This driving hollow cone is arranged at right angles to thedriven conical roller which can be moved along its axle away from thefriction wheel into an end position in which the friction wheel isthrown out of gear and the movement of the driving shaft is transferredby a coupling. 'The accompanying drawings illustrate different possibleways of making the device in accordance and suitable for carrying outthe invention in which Figure 1 shows the gearing with a section of thehollow cone; Fig. 2 a side elevation of the gearing without the frictionwheel; Fig. 3 a plan view of the gearing with a part section through thedriven cone; Fig. 4 a modification of the gearing for a sprocket wheelgearing; Fig. 5 an arrangement of gearing in which a friction couplingis inserted between the driving shaft and the shaft of the driven cone.Fig. 6 is a plan view in detail of the frame and double cone wheel; Fig.7 is a side view thereof; and Fig. 8 is an end view.

Similar reference characters indicate corresponding parts throughout theseveral views.

In the drawings with the motor shaft 1 a cone disk 2 is joined betweentwo rings which hold the cone in a distinct position relative to adriven hollow cone 3. The hollow cone 3 is provided with a hub mountedupon a shaft 4 arranged at right angles to the driving shaft 1. Betweenthe cone disk 2 and the hollow cone 45 3 is a friction wheel 5 adaptedto traverse the surface of the cone disk 2 and hollow cone 3,respectively, from the innermost to the outermost edges thereof. Thefriction wheel 5 consists in a double cone and is rotatively mounted ina frame 6 having an exterior 50 rack 7. For the shifting of the frame 6is provided a toothed segment 8 in engagement with the said rack 7 andby means of which the friction wheel 5 can be shifted in any desirableposition for the purpose of varying the speed imparted from the drivingshaft 1 to the hollow cone 3. Said toothed segment 8 may be actuated byany suitable gear mechanism not shown. On the free end of the drivingshaft 1 is fixed a clutchv member 15 The latter is adapted to be engagedby a clutch 15 keyed to a driven shaft 16 so as to impart a positivedrive from the driving shaft 1 to said driven shaft 16. Also fixed tothe driving shaft 1 is a cone 24, the latter adapted to be frictionallyengaged by the beveled surface 3 of the hollow cone 3, and when suchengagement is made a reverse movement is imparted from the driving shaftthrough the medium of the cone 3 to the driven shaft 16, and at adecreased ratio of speed.

To form connection between the cone 3 and the driven shaft 16 is a gearwheel 18 loosely mounted on said latter shaft and which is in mesh witha pinion 23 keyed to the hub of the hollow cone 3 mounted on the shaft4. To maintain this pinion 23 in normal engagement with the gear wheel18 is provided a spring 22 surrounding the hub of the hollow cone 3 andhaving one end bearing against said cone and the other end against thesaid pinion. To maintain the gear wheel 18 locked for movement of thedriven shaft 16 the clutch 15 is brought into coupling engagement withthe clutch member 15 carried by the gear 18, said clutch 15 beingnormally coupled with the clutch 15.

To operate the clutch 1.5 for coupling the same with the clutch member15 to afford a positive drive from the driving shaft 1 to the drivenshaft 16 is provided a red 9 having an enlarged head 9 and which ismounted in the frame 6. The end opposite the enlarged extremity 9 of therod 9 is pivotally connected to a bent bell-crank lever 11, the latterhaving connection by a link 12 with a forked lever 13 pivoted at 14, thefork of the lever having connection with the'elutch 15.

To effect a reverse movement of the driveii shaft from a positive driveof the diiving shaft 1 the operator ac tuates the toothed segment 8 soas to cause the movement of the frame 6, thereby changing the positionof the double cone friction wheel 5 which will increase or decrease thespeed of rotation according to the direction of movement of saidfriction wheel 5, and the latter being in frictional contact with thehollow cone 3 causes the movement of the latter and through the ine-.dium of which imparts movement to the pinion 23 which rotates in thesame direction, the latter being in mesh with the gear wheel 18 looselymounted on the driven shaft 16 and by the clutch 15 keyed to said drivenshaft being normally coupledwith said pinion 18 thereby imparts areverse rotary movement to said driven shaft 16. Now to decrease thespeed of the driven shaft and to drive the same in the same direction asif coupled directly with the driving shaft 1 the operator shifts theframe 6 by actuating the segment 8 causing said frame 6 to abut againstthe enlarged extremity 10 of the rod 10 and through the medium of whicha lever 19 pivotally connected thereto and also having connection withthe hub of the cone 3 is actuated in a direction to shift the cone 3 soas to bring the beveled surface 3 into frictional engagement with thecone 24, and when in frictional engagement causes the rotation therewithof the pinion 23 which normally is in mesh with the gear 18, the latterbeing coupled with the clutch 15 imparts rotation to the driven shaft16. I

If the operator desires to impart a positive drive from the drivingshaft 1 to the driven shaft 16, the frame 6 is again moved by thesegment 8 until said frame contacts or abuts against the enlargedextremity 9 thus causing the rod 9 to move shifting the bell-crank lever11. in opposition to the spring 17 and through the link 12 actu ates theforked lever 13 so as to change the position to disengage the clutchfrom the clutch member 15 on the gear wheel 18 to cause said clutch 15to engage the clutch member 15 fixed on the driving shalt 11, andthereby imparting a positive rotary movement from the driving shalt 1 tothe driven shalt 16, and at the same time the hollow cone 3 has beenshifted from frictional engagement with the cone 24. To limit themovement of the lever 19 are pins 20 and 21 engaging in slots formed inthe said lever 19. On the driven shaft 16 is a gear wheel 35 in meshwith a gear wheel 36 through the medium of Which movement is imparted tothe driving wheels of a motor car not shown In Fig. 5 is shown amodification and mounted on the driving shaft 1 is a gear wheel 28 inmesh with a gear wheel 27, the latter being freely rotatable on theshaft 4 and having a beveled friction wheel 26. Also mounted on theshaft 4 and keyed thereto is a cone wheel 3, the latter adapted to beshifted into frictional contact with the cone 26 so that rotary movementfrom the driving shaft 1. can be imparted through the gear 28 to thegear 27 rotating the cone 26 and the cone wheel 3 keyed to the shaft 4and the shalt 4 having a pinion in mesh with a gear 38 carried by ashaft having a chain wheel 37, the latter imparting movement to thedriving wheels of a motor vehicle. Keyed to the driving shaft 1 is afriction wheel 24 adapted to be brought into frictional c011- tact witha beveled surface 3 of the cone wheel 3 and when in frictional contactcauses a reverse movement to be imparted from the driving shaft throughthe medium of the cone 3 to the shaft 4 and from thence through thepinion to the gear wheel 38, and also at a much reduced speed. Now, ifit is desired to increase the speed of reverse motion of the gear 38,the cone 3 is shifted into frictional contact with the double cone wheel5, the latter being in lrictional contact with the cone disk 2 whichreceives its motion from shaft 1 and imparting the same through thedouble cone wheel 5 to the cone wheel 3 to the shaft 4 through thepinion in mesh with the gear 38. The adjustment of the double cone wheel5 is identical with that shown in Fig. 1. To shift the cone wheel 3 intocontact with the cone 26, the operator manipulates a handle 30 fixed toa shaft 32 having gear wheels31 in mesh with gear wheels 33, the lattercarrying hub sections having an interiorly screw-threaded aperture inengagement with screw-threaded extensions on the shaft 4, and the latteris adapted to be shifted laterally in opposite directions in accordancewith the reverse movement of the lever 30. For shifting the cone 24, arod 25 is provided so that said cone may be shifted longitudinally ofthe driving shaft 1.

What is claimed is:

1, In frictional gearing of the class described, a driving shaft, a diskcone thereon, a driven shaft arranged at an angle to the first mentionedshaft, a hollow cone roller carried by 'said driven shaft, and meansadapted to be brought into frictional contact with the hollow coneroller to impart rotary movement from the driving shaft to the drivenshaft.

2. In frictional gearing of the class described, a driving shaft, adriven shaft at an angle thereto, a cone disk carried by the drivingshaft, a hollow cone roller carried by the driven shaft, a shiftabledouble conical frictional wheel adapted for frictional engagement withthe cone disk and cone roller, a cone carried by the driving shaft, saidcone roller having a beveled frictional surface for contact with thedone on the driving shaft, and mechanism for shifting the cone rollerfrom contact with the double cone wheel to frictional contact with thecone on the driving shaft to vary the rate of speed of the driven shaftimparted from the driving shaft.

3. In frictional gearing of the class described, a driving shaft, adriven shaft at an angle thereto, a cone disk carried by the drivingshaft, a hollow cone roller carried by the driven shaft, a shiftabledouble conical frictionalwhecl adapted for frictional engagement withthe cone disk and cone roller, a cone carried by the driving shaft, saidcone roller having a beveled frictional surface for contact with thecone on the driving shaft, and means for changing the position offrictional contact of the double cone wheel with respect to the conedisk and cone roller.

4. In frictional gearing of the class described, a driving shaft, ahollow cone thereon, a driven shaft arranged at an angle to the firstmentioned shaft, a conical roller carried thereby, a shiftable doubleconical roller cooperative with the hollow cone and conical roller, andmechanism for shifting the said double conical roller for increasing anddecreasing the speed of the driven shaft.

5 In frictional gearing of the class described, a driving shaft, adriven shaft arranged at an angle thereto, a hollow cone carried by thedriving shaft, a cone roller carried by the driven shaft, a doubleconical roller interposed between the hollow cone and the conical rollerand in frictional contact with the same, mechanism for shifting thedouble conical roller for increasing and decreasing the speed of thedriven shaft with respect to the driving shaft, and clutch mechanismcooperative with the driving and driven shafts.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

RUDOLF GAWRON. JOSEF GAWRON.

Witnesses HENRY Hnsrnn, WoLonMAn HAUPT.

